#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>

int main() {
    char ch = 0;
    while (scanf("%c", &ch) != EOF)
    {
        if (ch >= 'A' && ch <= 'z')
        {
            printf("%c is an alphabet.\n", ch);
        }

        else
        {
            printf("%c is not an alphabet.\n", ch);
        }
        getchar();
    }
    return 0;
}